"This book includes a description of the larynx more accurate than that of any previous author, and is also notable for its fine copperplate engravings"(Morton's Medical Bibliography, Fifth Edition, Edited by Jeremy M. Norman)..

"The method of Casserius is particularly well illustrated in his treatment of the apparatus of hearing. He describes and figures the auditory structure of man, child, new-born infant, foetus, ape, ox, horse, dog, hare, cat, sheep, goose, pig, mouse, turkey, and pike. The investigation includes the ossicles and he shows careful dissections of the cartilage of auricle and external auditory muscles. Excellent too is his account of the vocal organs. Copper plates are employed and these are capable of taking a much finer line than woodcuts. Casserius set a very high standard both of workmanship and accuracy. His figures are the model for the copper plate illustrator as those of Vesalius and Ruini are for the woodcut operator"(Singer).

"Professor at Padua and a teacher of William Harvey. He described the muscles of the ossicles of the ear, the musculocutaneous nerve and the larynx. He practiced bronchotomy which he learnt from Fabricius, his assistant" (A Dictionary of the History of Medicine, Anton Sebastian).